6c9af1435d
Does a few things: - Refactors `run_command_test` significantly to reduce global fixtures - Replaced stringly-typed things with enum-like objects - Adds a lot stronger coverage for `run_command` to make future refactors safer - Takes advantage of `package:test` having a workable matchers system and uses it - Changes `return 1` into `throw FatalError(...)` where it makes sense in `run_command` As a result of the refactoring work, I also fixed a bug: Closes https://github.com/flutter/flutter/issues/147646.